update-initramfs

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examples

0

Update the initramfs of the newest kernel:

update-initramfs -u

Create the initramfs for a specific kernel:

update-initramfs -c -k 2.6.18-1-686

description

The
update-initramfs script manages your initramfs
images on your local box. It keeps track of the existing
initramfs archives in /boot. There are three modes of
operation create, update or delete. You must at least
specify one of those modes.

The initramfs
is a gzipped cpio archive. At boot time, the kernel unpacks
that archive into RAM disk, mounts and uses it as initial
root file system. All finding of the root device happens in
this early userspace.

options

-kversion

Set the specific kernel version
for whom the initramfs will be generated. For example the
output of uname -r for your currently running kernel.
This argument is optional for update. The default is the
latest kernel version.

The use of
"all" for the version string specifies
update-initramfs to execute the chosen action
for all kernel versions, that are already known to
update-initramfs.

-c

This mode creates a new initramfs.

-u

This mode updates an existing initramfs.

-d

This mode removes an existing initramfs.

-t

Allows one to take over an custom initramfs with a newer
one.

-v

This option increases the amount of information you are
given during the chosen action.

-b

Set an different bootdir for the image creation.

-h

Print a short help page describing the available options
in update-initramfs.